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      <a href="/2018/01/14/vue2-notes-13-dialog-component/" title="Vue2使用笔记13--添加Promise弹窗" itemprop="url">Vue2使用笔记13--添加Promise弹窗</a>
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    <time datetime="2018-01-14T06:47:03.000Z" itemprop="datePublished">2018-01-14</time>
    更新日期:<time datetime="2018-12-18T15:41:36.557Z" itemprop="dateModified">2018-12-18</time>
    
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			<strong class="toc-title">文章目录</strong>
		<ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#弹窗设计"><span class="toc-number">1.</span> <span class="toc-text">弹窗设计</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#逻辑实现"><span class="toc-number">1.1.</span> <span class="toc-text">逻辑实现</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#弹窗调用方法"><span class="toc-number">1.2.</span> <span class="toc-text">弹窗调用方法</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#dialogStore"><span class="toc-number">1.3.</span> <span class="toc-text">dialogStore</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#弹窗组件"><span class="toc-number">1.4.</span> <span class="toc-text">弹窗组件</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#弹窗使用"><span class="toc-number">1.5.</span> <span class="toc-text">弹窗使用</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#结束语"><span class="toc-number">2.</span> <span class="toc-text">结束语</span></a></li></ol>
		</div>
		
		<p>最近在使用 Vue2 作为项目中前端的框架，《Vue2 使用笔记》系列用于记录过程中的一些使用和解决方法。本文记录添加 Promise 弹窗的过程。</p>
<a id="more"></a>
<h2 id="弹窗设计"><a href="#弹窗设计" class="headerlink" title="弹窗设计"></a>弹窗设计</h2><hr>
<p>我们原生的<code>window.confirm()</code>会阻塞进程，同时也不支持自定义样式。所以我们这里使用自己的弹窗，同时希望以 Promise 的方式来调用。</p>
<h3 id="逻辑实现"><a href="#逻辑实现" class="headerlink" title="逻辑实现"></a>逻辑实现</h3><p>首先，我们最终想要的效果是：使用 Promise 来调用弹窗确认，通过 resolve 和 reject 的方式来进行确认操作。故我们需要生产以下功能：</p>
<ol>
<li>一个调用方法，返回一个 Promise。</li>
<li>该方法会触发弹窗，该弹窗为一个组件。</li>
<li>通过 Store 的方式控制弹窗的影藏展示、提示内容等。</li>
</ol>
<h3 id="弹窗调用方法"><a href="#弹窗调用方法" class="headerlink" title="弹窗调用方法"></a>弹窗调用方法</h3><p>为了方便拓展性，我们这样操作：</p>
<ol>
<li>setDialog: 可控制按钮的数量和显示，resolve 返回按钮的序号。</li>
<li>confirmDialog：在 setDialog 的基础上，封装成常用的 confirm 调用方式。</li>
</ol>
<p>来看看实现：</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div><div class="line">29</div><div class="line">30</div><div class="line">31</div><div class="line">32</div><div class="line">33</div><div class="line">34</div><div class="line">35</div><div class="line">36</div><div class="line">37</div><div class="line">38</div><div class="line">39</div><div class="line">40</div><div class="line">41</div><div class="line">42</div><div class="line">43</div><div class="line">44</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">import</span> dialogStore <span class="keyword">from</span> <span class="string">"components/AppDialog/dialogStore"</span>;</div><div class="line"><span class="comment">/*</span></div><div class="line"> * 提示框</div><div class="line"> * </div><div class="line"> * 返回Promise，参数index为点击的按钮的索引</div><div class="line"> * </div><div class="line">*/</div><div class="line"><span class="keyword">export</span> <span class="function"><span class="keyword">function</span> <span class="title">setDialog</span>(<span class="params">&#123;</span></span></div><div class="line">  title,</div><div class="line">  contents = [],</div><div class="line">  buttons = [&#123; text: <span class="string">"确定"</span>, class: <span class="string">"btn-primary"</span> &#125;]</div><div class="line">&#125;) &#123;</div><div class="line">  <span class="comment">// 默认只有一个确定按钮</span></div><div class="line">  <span class="keyword">return</span> <span class="keyword">new</span> <span class="built_in">Promise</span>(<span class="function">(<span class="params">resolve, reject</span>) =&gt;</span> &#123;</div><div class="line">    dialogStore.commit(<span class="string">"setDialog"</span>, &#123;</div><div class="line">      title,</div><div class="line">      contents,</div><div class="line">      buttons,</div><div class="line">      resolve,</div><div class="line">      reject</div><div class="line">    &#125;);</div><div class="line">  &#125;);</div><div class="line">&#125;</div><div class="line"></div><div class="line"><span class="comment">// 确认弹窗，点击确定则resolve，其他则reject</span></div><div class="line"><span class="keyword">export</span> <span class="function"><span class="keyword">function</span> <span class="title">confirmDialog</span>(<span class="params">content</span>) </span>&#123;</div><div class="line">  <span class="keyword">return</span> <span class="keyword">new</span> <span class="built_in">Promise</span>(<span class="function">(<span class="params">resolve, reject</span>) =&gt;</span> &#123;</div><div class="line">    setDialog(&#123;</div><div class="line">      <span class="attr">contents</span>: [content],</div><div class="line">      <span class="attr">buttons</span>: [</div><div class="line">        &#123; <span class="attr">text</span>: <span class="string">"确定"</span>, <span class="attr">class</span>: <span class="string">"btn-primary"</span> &#125;,</div><div class="line">        &#123; <span class="attr">text</span>: <span class="string">"取消"</span>, <span class="attr">class</span>: <span class="string">"btn-default"</span> &#125;</div><div class="line">      ]</div><div class="line">    &#125;).then(<span class="function"><span class="params">index</span> =&gt;</span> &#123;</div><div class="line">      <span class="keyword">if</span> (index == <span class="number">0</span>) &#123;</div><div class="line">        resolve();</div><div class="line">      &#125; <span class="keyword">else</span> &#123;</div><div class="line">        reject();</div><div class="line">      &#125;</div><div class="line">    &#125;);</div><div class="line">  &#125;);</div><div class="line">&#125;</div><div class="line"></div><div class="line"><span class="keyword">export</span> <span class="keyword">default</span> setDialog;</div></pre></td></tr></table></figure>
<p>这里我们主要处理调用的逻辑，而 confirmDialog 多处理了 index 是否为确认按钮的逻辑。更多的时候，我们是通过 dialogStore 来控制弹窗的内容和展示。</p>
<h3 id="dialogStore"><a href="#dialogStore" class="headerlink" title="dialogStore"></a>dialogStore</h3><p>不多说，上码：</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div><div class="line">29</div><div class="line">30</div><div class="line">31</div><div class="line">32</div><div class="line">33</div><div class="line">34</div><div class="line">35</div><div class="line">36</div><div class="line">37</div><div class="line">38</div><div class="line">39</div><div class="line">40</div><div class="line">41</div><div class="line">42</div><div class="line">43</div><div class="line">44</div><div class="line">45</div><div class="line">46</div><div class="line">47</div><div class="line">48</div><div class="line">49</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">import</span> Vue <span class="keyword">from</span> <span class="string">"vue"</span>;</div><div class="line"><span class="keyword">import</span> Vuex <span class="keyword">from</span> <span class="string">"vuex"</span>;</div><div class="line">Vue.use(Vuex);</div><div class="line"></div><div class="line"><span class="keyword">const</span> dialogStore = <span class="keyword">new</span> Vuex.Store(&#123;</div><div class="line">  <span class="attr">state</span>: &#123;</div><div class="line">    <span class="attr">data</span>: &#123;</div><div class="line">      <span class="comment">// 展示数据</span></div><div class="line">      title: <span class="string">""</span>,</div><div class="line">      <span class="attr">contents</span>: [<span class="string">""</span>],</div><div class="line">      <span class="attr">buttons</span>: [</div><div class="line">        &#123;</div><div class="line">          <span class="attr">text</span>: <span class="string">"确定"</span>,</div><div class="line">          <span class="attr">class</span>: <span class="string">"btn-primary"</span></div><div class="line">        &#125;</div><div class="line">      ]</div><div class="line">    &#125;,</div><div class="line">    <span class="attr">promise</span>: <span class="literal">null</span> <span class="comment">// 保存promise</span></div><div class="line">  &#125;,</div><div class="line">  <span class="attr">mutations</span>: &#123;</div><div class="line">    <span class="comment">// 点击时，promise resolve，并返回点击的button的序号</span></div><div class="line">    click(state, index) &#123;</div><div class="line">      $(<span class="string">"#confirmModal"</span>).modal(<span class="string">"hide"</span>);</div><div class="line">      state.promise.resolve(index);</div><div class="line">    &#125;,</div><div class="line">    <span class="comment">// 关闭弹窗，promise reject</span></div><div class="line">    close(state) &#123;</div><div class="line">      $(<span class="string">"#confirmModal"</span>).modal(<span class="string">"hide"</span>);</div><div class="line">      state.promise.reject();</div><div class="line">    &#125;,</div><div class="line">    <span class="comment">// 设置弹窗内容，同时显示弹窗</span></div><div class="line">    setDialog(state, &#123; title, contents, buttons, resolve, reject &#125;) &#123;</div><div class="line">      <span class="comment">// 设置弹窗内容</span></div><div class="line">      state.data = &#123;</div><div class="line">        title,</div><div class="line">        contents,</div><div class="line">        buttons</div><div class="line">      &#125;;</div><div class="line">      <span class="comment">// 保存promise</span></div><div class="line">      state.promise = &#123;</div><div class="line">        resolve,</div><div class="line">        reject</div><div class="line">      &#125;;</div><div class="line">      $(<span class="string">"#confirmModal"</span>).modal(<span class="string">"show"</span>);</div><div class="line">    &#125;</div><div class="line">  &#125;</div><div class="line">&#125;);</div><div class="line"></div><div class="line"><span class="keyword">export</span> <span class="keyword">default</span> dialogStore;</div></pre></td></tr></table></figure>
<p>我们在 dialogStore 中提供了三个 mutations：</p>
<ol>
<li>设置弹窗内容，同时显示弹窗。</li>
<li>点击按钮，同时 promise resolve，并返回点击的 button 的 index。</li>
<li>关闭弹窗，同时 promise reject。</li>
</ol>
<p>其实我们在控制一些内容的时候，使用一个公共的对象也是可以实现的。为什么要用Store呢？因为Store能在模版中使用，这里主要是依赖它来控制弹窗的展示内容，当然我们还可以用各种各样的方式来实现的。</p>
<h3 id="弹窗组件"><a href="#弹窗组件" class="headerlink" title="弹窗组件"></a>弹窗组件</h3><p>这里我们需要在 Sidebar 上使用到这个用户名，故我们需要在该组件中引入：</p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div><div class="line">29</div><div class="line">30</div><div class="line">31</div><div class="line">32</div><div class="line">33</div><div class="line">34</div><div class="line">35</div><div class="line">36</div><div class="line">37</div><div class="line">38</div><div class="line">39</div></pre></td><td class="code"><pre><div class="line"><span class="tag">&lt;<span class="name">template</span>&gt;</span></div><div class="line">  <span class="tag">&lt;<span class="name">div</span> <span class="attr">class</span>=<span class="string">"modal fade in"</span> <span class="attr">id</span>=<span class="string">"confirmModal"</span> <span class="attr">tabindex</span>=<span class="string">"-1"</span> <span class="attr">role</span>=<span class="string">"dialog"</span> <span class="attr">aria-labelledby</span>=<span class="string">"myModalLabel"</span>&gt;</span></div><div class="line">    <span class="tag">&lt;<span class="name">div</span> <span class="attr">class</span>=<span class="string">"modal-dialog"</span> <span class="attr">role</span>=<span class="string">"document"</span> <span class="attr">style</span>=<span class="string">"margin-top: 200px;"</span>&gt;</span></div><div class="line">      <span class="tag">&lt;<span class="name">div</span> <span class="attr">class</span>=<span class="string">"modal-content"</span> &gt;</span></div><div class="line">        <span class="tag">&lt;<span class="name">div</span> <span class="attr">class</span>=<span class="string">"modal-header"</span>&gt;</span></div><div class="line">          <span class="tag">&lt;<span class="name">button</span> <span class="attr">type</span>=<span class="string">"button"</span> <span class="attr">class</span>=<span class="string">"close"</span> <span class="attr">data-dismiss</span>=<span class="string">"modal"</span> <span class="attr">aria-label</span>=<span class="string">"Close"</span> @<span class="attr">click</span>=<span class="string">"close"</span>&gt;</span><span class="tag">&lt;<span class="name">span</span> <span class="attr">aria-hidden</span>=<span class="string">"true"</span>&gt;</span>&amp;times;<span class="tag">&lt;/<span class="name">span</span>&gt;</span><span class="tag">&lt;/<span class="name">button</span>&gt;</span></div><div class="line">          <span class="tag">&lt;<span class="name">h4</span> <span class="attr">class</span>=<span class="string">"modal-title"</span> <span class="attr">id</span>=<span class="string">"myModalLabel"</span>&gt;</span>&#123;&#123;data.title || '请确认'&#125;&#125;<span class="tag">&lt;/<span class="name">h4</span>&gt;</span></div><div class="line">        <span class="tag">&lt;/<span class="name">div</span>&gt;</span></div><div class="line">        <span class="tag">&lt;<span class="name">div</span> <span class="attr">class</span>=<span class="string">"modal-body"</span>&gt;</span></div><div class="line">          <span class="comment">&lt;!-- 多行文字需要 --&gt;</span></div><div class="line">            <span class="tag">&lt;<span class="name">p</span> <span class="attr">v-for</span>=<span class="string">"content in data.contents"</span> <span class="attr">:key</span>=<span class="string">"content"</span>&gt;</span>&#123;&#123;content&#125;&#125;<span class="tag">&lt;/<span class="name">p</span>&gt;</span></div><div class="line">        <span class="tag">&lt;/<span class="name">div</span>&gt;</span></div><div class="line">        <span class="tag">&lt;<span class="name">div</span> <span class="attr">class</span>=<span class="string">"modal-footer"</span> <span class="attr">v-if</span>=<span class="string">"data.buttons &amp;&amp; data.buttons.length"</span>&gt;</span></div><div class="line">            <span class="comment">&lt;!-- 多个按钮需要 --&gt;</span></div><div class="line">            <span class="tag">&lt;<span class="name">button</span> <span class="attr">v-for</span>=<span class="string">"(btn, index) in data.buttons"</span> <span class="attr">:key</span>=<span class="string">"index"</span> <span class="attr">type</span>=<span class="string">"button"</span> <span class="attr">class</span>=<span class="string">"btn"</span> <span class="attr">:class</span>=<span class="string">"btn.class"</span> @<span class="attr">click</span>=<span class="string">"clickButton(index)"</span>&gt;</span>&#123;&#123;btn.text&#125;&#125;<span class="tag">&lt;/<span class="name">button</span>&gt;</span></div><div class="line">        <span class="tag">&lt;/<span class="name">div</span>&gt;</span></div><div class="line">      <span class="tag">&lt;/<span class="name">div</span>&gt;</span></div><div class="line">    <span class="tag">&lt;/<span class="name">div</span>&gt;</span></div><div class="line">  <span class="tag">&lt;/<span class="name">div</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">template</span>&gt;</span></div><div class="line"><span class="tag">&lt;<span class="name">script</span>&gt;</span><span class="javascript"></span></div><div class="line"><span class="keyword">import</span> dialogStore <span class="keyword">from</span> <span class="string">"./dialogStore"</span>;</div><div class="line"><span class="keyword">export</span> <span class="keyword">default</span> &#123;</div><div class="line">  <span class="attr">name</span>: <span class="string">"app-dialog"</span>,</div><div class="line">  <span class="attr">computed</span>: &#123;</div><div class="line">    data() &#123;</div><div class="line">      <span class="keyword">return</span> dialogStore.state.data;</div><div class="line">    &#125;</div><div class="line">  &#125;,</div><div class="line">  <span class="attr">methods</span>: &#123;</div><div class="line">    clickButton(index) &#123;</div><div class="line">      dialogStore.commit(<span class="string">"click"</span>, index);</div><div class="line">    &#125;,</div><div class="line">    close() &#123;</div><div class="line">      dialogStore.commit(<span class="string">"close"</span>);</div><div class="line">    &#125;</div><div class="line">  &#125;</div><div class="line">&#125;;</div><div class="line"><span class="tag">&lt;/<span class="name">script</span>&gt;</span></div></pre></td></tr></table></figure>
<p>当然，我们还需要在最外层注册和引入该组件，这里就不多说了，感兴趣可以参考下源码。</p>
<h3 id="弹窗使用"><a href="#弹窗使用" class="headerlink" title="弹窗使用"></a>弹窗使用</h3><p>我们在登录页面，添加该弹窗提示。</p>
<figure class="highlight js"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div></pre></td><td class="code"><pre><div class="line"><span class="comment">// Login.vue</span></div><div class="line"><span class="keyword">import</span> &#123; confirmDialog &#125; <span class="keyword">from</span> <span class="string">"tools/setDialog"</span>;</div><div class="line"></div><div class="line"><span class="keyword">export</span> <span class="keyword">default</span> &#123;</div><div class="line">  <span class="comment">// ...其他配置</span></div><div class="line">  methods: &#123;</div><div class="line">    <span class="comment">// 登陆事件</span></div><div class="line">    login() &#123;</div><div class="line">      <span class="keyword">const</span> &#123; username, password &#125; = <span class="keyword">this</span>;</div><div class="line">      <span class="keyword">if</span> (!username || !password) &#123;</div><div class="line">        <span class="keyword">this</span>.error.text = <span class="string">"用户名和密码不能为空"</span>;</div><div class="line">        <span class="keyword">this</span>.error.shown = <span class="literal">true</span>;</div><div class="line">        <span class="keyword">return</span>;</div><div class="line">      &#125;</div><div class="line">      confirmDialog(<span class="string">`确定登录？`</span>).then(<span class="function"><span class="params">()</span> =&gt;</span> &#123;</div><div class="line">        userStore.dispatch(<span class="string">"login"</span>, &#123; username, password &#125;);</div><div class="line">        <span class="keyword">this</span>.$router.push(&#123; <span class="attr">name</span>: <span class="string">"App"</span> &#125;);</div><div class="line">      &#125;);</div><div class="line">    &#125;</div><div class="line">  &#125;</div><div class="line">&#125;;</div></pre></td></tr></table></figure>
<ul>
<li>页面效果</li>
</ul>
<p><img src="https://github-imglib-1255459943.cos.ap-chengdu.myqcloud.com/1514887347%281%29.png" alt="image"></p>
<h2 id="结束语"><a href="#结束语" class="headerlink" title="结束语"></a>结束语</h2><hr>
<p>本节我们介绍了使用Promise方式实现弹窗的过程，这里面有个比较尴尬的问题就是，由于全局弹窗只有这么一个，所以如果有二次确认的过程（两个以上弹窗），这样子就不合适啦。<br><a href="https://github.com/godbasin/godbasin.github.io/tree/blog-codes/vue2-notes/13-dialog-component" target="_blank" rel="external">此处查看项目代码</a><br><a href="http://vue2-notes.godbasin.com/13-dialog-component/index.html" target="_blank" rel="external">此处查看页面效果</a></p>
  
		
		<p style="margin-top:50px;">查看Github有更多内容噢：<a href="https://github.com/godbasin">https://github.com/godbasin</a></p>
	</div>
	<img src="https://github-imglib-1255459943.cos.ap-chengdu.myqcloud.com/2code2.jpg" width="200" height="200" style="display:block;margin: 0 auto;" />
	<p style="text-align: center;margin-top: 10px;margin-bottom: 20px;">码生艰难，写文不易，给我家猪囤点猫粮了喵~</p>
	<div class="author-right">
  		<p>作者：被删</p>
  		<p>出处：<a href="https://godbasin.github.io">https://godbasin.github.io</a></p>
  		<p>本文版权归作者所有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。</p>
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  <strong class="toc-title">文章目录</strong>
  <ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#弹窗设计"><span class="toc-number">1.</span> <span class="toc-text">弹窗设计</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#逻辑实现"><span class="toc-number">1.1.</span> <span class="toc-text">逻辑实现</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#弹窗调用方法"><span class="toc-number">1.2.</span> <span class="toc-text">弹窗调用方法</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#dialogStore"><span class="toc-number">1.3.</span> <span class="toc-text">dialogStore</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#弹窗组件"><span class="toc-number">1.4.</span> <span class="toc-text">弹窗组件</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#弹窗使用"><span class="toc-number">1.5.</span> <span class="toc-text">弹窗使用</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#结束语"><span class="toc-number">2.</span> <span class="toc-text">结束语</span></a></li></ol>
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